The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 25, 2001
Filed:
Oct. 06, 2000
Applicant:
Inventors:
Martin Meschik, Vienna, AT;
Markus Schermann, Wiener Neustadt, AT;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 3/700 ; H02P 7/00 ;
U.S. Cl.
CPC ...
H02K 3/700 ; H02P 7/00 ;
Abstract
A speed control device, whereby individual motor phases of an electronically commutated multiphase electric motor are supplied via corresponding individual phase shifters from a constant voltage supply unidirectionally and unpulsed during time blocks which are derived from stored time block pulse patterns specific to certain speeds. The speed control device permits setting a variety of speeds with relatively little expense and with low operating losses. The speed control device further provides a simple device for setting intermediate speeds by means of low-frequency switching between at least two time block pulse patterns.